<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <script src="/网页展示/js/jquery-3.4.1.min.js"></script>
</head>
<body>
    <div>12345678911</div>
    <button>验证</button>
    <script src="../jQuery/实际开发验证.js"></script>
    <script>
        $('button').click(function(){
            let str = $('div').text()
            valPhone()
        })
    </script>
</body>
</html>